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Gob-side entry retaining

WebOct 30, 2024 · Abstract. Gob-area roof rupture movement is a key disturbance factor for gob-side entry retaining. The characteristics of gob-area sequential roof collapse of … http://yuxiqbs.cqvip.com/Qikan/Article/Detail?id=7103526305

An Innovative Approach for Gob-Side Entry Retaining in Thick ... - MDPI

WebAug 23, 2024 · Structural mechanics model diagram of gob-side entry retaining without filling. (A) Stress and load bearing model diagram, (B) stability control model diagram. … WebAug 30, 2024 · The coal wall, gob-side backfill, and gangues in goaf, constitute the support system for Gob-side entry retaining (GER) in coal mines. Reasonably allocating and … free vpns download https://myfoodvalley.com

Distribution Law of Mining Stress of the Gob-Side Entry …

WebAug 6, 2024 · Gob-side entry retention by roof cutting changes the structure of the roadway roof and goaf roof by directional energy-accumulating blasting, and it realizes goaf-side roadway protection and pillar-free mining by utilizing the collapse and swelling of … WebIn the gob-side entry retaining technology of roof cutting and pressure relief, one side of the roadway is solid coal, and the other side is the rock block caving area in the goaf. The key block B structure will be formed in the rock section of the retained roadway roof. WebNov 6, 2024 · Gob-side entry retaining (GER) is a popular non-pillar mining technique regarding how to reserve a gateroad for the use of next panel mining. When used in thick coal seams, the conventional entry retaining method requires a huge amount of filling materials and may cause entry (gateroad) accidents. fashion bloggers in mumbai

Research on the Key Technology of Gob-Side Entry Retaining by …

Category:Ground response of entries driven adjacent to a retreating …

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Gob-side entry retaining

Stability analysis of roadside backfill body at gob-side entry ...

WebApr 8, 2024 · The field investigation showed that the coal on the left side of the heading face was harder than that on the right side. ... Ning, J.G.; Zhao, T.B. Design and construction of entry retaining wall along a gob side under hard roof stratum. Int. J. Rock Mech. Min. Sci. 2015, 77, 115–121. [Google Scholar] Zhao, H.C.; Kaunda, R.B. Numerical ... WebAt present, the commonly used section roadway protection methods can mainly be classified into two categories: gob-side entry driving with small coal pillars (GSEDSCP) [6,7] and gob-side entry...

Gob-side entry retaining

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WebMar 31, 2024 · Based on the application of the retained gob-side entry in a fully mechanized face E2307 headgate, the stress distribution and deformation characteristics ... In order to make clear the pressure relief mechanism and application effect of directional hydraulic fracturing for gob-side entry retaining, the directional hydraulic fracturing was ... WebJul 1, 2024 · In this study, we aiming at the problems of severe surrounding rock deformation and support failure during the reuse of gob side entry retaining, we …

WebNov 17, 2024 · In the gob-side entry retaining technology of longwall mining, only one entry needs to be excavated during one working face mining and another entry is … WebJun 20, 2013 · Gob-side entry retaining technology with roof cutting (GERRC) has been widely used in flat and near-flat coal seam conditions, but its application under inclined coal seam is still very deficient.

WebSep 29, 2024 · Published29 Sept 2024. Abstract. Through the analysis of the project of gob-side entry retaining in the deep gangue filling 2305S-2# working face of the … WebThe technology for gob-side entry retaining in steep coal seams is still in the development stage. The analysis results of the caving structure of main roof, low influence of gateway’s stability ...

WebJan 12, 2024 · Non-pillar mining technology plays an important role in sustainable exploitation of coal resources. Gob-side entry retaining by roof cutting (GERRC) is a new technique regarding a non-pillar mining method based …

WebMay 14, 2024 · Zhao, H. State-of-the-art of standing supports for gob-side entry retaining technology in China. J. S. Afr. Inst. Min. Metall. 119, 891–906 (2024). Google Scholar fashion bloggers in summer backless dressesWebFeb 23, 2024 · Understanding the dynamic loading mechanism of gob-side entry retaining (GER) in TCS with THF is the first step in determining the stability of the retained … free vpn service for firestickWebDec 1, 2015 · Yuwu coal mine employs an innovative approach to gob-side entry retaining in N2105 panel (Fig. 5a), which is a highly gassy fully-mechanized top-coal caving panel. … fashion bloggers with fake bags